I have an iphone 6S. I recently downloaded iOs 10. Now when I am listening to music on my headphones, every time my text messages are open I can hardly hear my music because the volume automatically turns down. Does anyone know how to fix this? I can't seem to find anything on the internet about other people having this issue. I want to keep the volume the same when I am responding to a text! This happens when my phone is on silent.